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Iossi Roofing

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Iossi Roofing
Iossi Roofing

Your home is a large investment and whether you are shopping for a new house or selling one, an important aspect will be the roof. This is because a roof is the first defense against the elements and protects everything beneath it.

An improperly installed roof can be a nightmare. A roof that leaks or no longer functions as it should can cause a lot of stress. Replacing your roof can feel like a daunting task with so many factors involved, and with so many people offering you this 'great' deal or that 'great' deal, even selecting a company to work with can become an issue. So when it comes time to replace such a large part of your investment you need to be as sure of the contractor doing the work as you do the products that contractor will be using.

Iossi has the experience required to provide you with a roof that will please both the eye and the budget, as well as a history of professional workmanship and top-of-the-line products backed by warranties.

In keeping with the Iossi Tradition of providing only quality products and workmanship, we also feels it is beneficial for a homeowner to understand the various components involved in a home upgrade; for that reason please see the following image and section regarding the Anatomy of a Roof.

roof anatomy
  • 1. Ridge: An intersection of two roof planes forming a horizontal peak.
  • 2. Ridge Vent: An exhaust vent that runs horizontally along the peak of the roof, allowing warm humid air to escape from the attic. This helps promote a cool dry attic and keeps moisture from becoming trapped, which helps with preventing rotting, mildew, warped siding.
  • 3. Flashing: Waterproofing construction used at intersections of different planes or at openings in the roof.
  • 4. Hip: The intersection of two roof planes that meet to form a sloping ridge running from the peak to the eave.
  • 5. Valley: The intersection of two sloping roofs joining at an angle to provide water runoff.
  • 6. Deck: The structural base for the roof, usually made of wood or plywood.
  • 7. Underlayment: A layer of protective material between the deck and the shingles. This will help with shedding water off the roof deck and away from the home.
  • 8. Gable Roof: see number 10.
  • 9. Metal Drip Edge: A narrow strip of non-corrosive metal used at the rake to facilitate water runoff.
  • 10. Gable Roof: The triangular section of the outer wall at the peak of the roof. Also a type of roof.
  • 11. Ridge: An intersection of 2 roof planes forming a horizontal peak.
  • 12. Ice and Water Barrier: A self-adhesive waterproofing membrane used along eaves and valleys to protect these sensitive areas against ice damage and wind-driven rain, helping to prevent water infiltration.
  • 13. Eave: The lower border of the roof that overhangs the wall.
  • 14. Under eave Vent: Intake vents located under the eaves of the roof that help draw cool air into the attic. These help prevent damage and premature aging caused by attic moisture in the winter and excess heat in the summer.
Do You Need A New Roof?

Generally speaking, a new shingled roof should last upwards of 20+ years. However, many factors, such as proper installation, climate and ventilation impact the life of your roof.

The following image portrays some of the factors that indicate it is time to replace or repair your roof, and below the image is detailed information regarding those factors.

Iossi does not suggest anyone climb onto their roofs. If you think you might need to have your roof repaired or replaced, contact us for a free quote.

Roof Inspection

Algae: Algae growth causes a dark discoloration on roofs. The algae is usually brown to black in color which results in a streaked, dirty looking rooftop. It can be mistaken for soot, dirt or tree droppings. It is caused by the growth of air-borne algae which deposits itself on your roof and occurs most often in warm humid climates.

The good news is that algae growth does not affect the service life of your roofing material. While fungus or algae may not be easy to remove, it can be lightened temporarily using a diluted solution of chlorine bleach (1 gallon), trisodum phosphate (1 cup), and water(4 gallons); after spraying the roof, let the solution sit for 10 to 15 minutes (do not scrub) then flush the roof and greenery around the home with clear water.

High pressure washing is not recommended due to the possibility of granule loss, which will shorten the lifetime of your shingles.

For a more permanent solution, re-roof with Owens Corning Algae-resistant Shingles.

Damaged Flashing: This is caused by improper installation on a new roof, drying and cracking on an older roof, denting by improper nailing and settling of the structure.

Recommendation: In most cases it is only necessary to remove and replace the flashing and shingles around the damaged area.

Buckling: Caused by improperly applied felt, wrinkled underlayment, roof deck movement, spacers not used in between roof deck boards, poor roof ventilation or new shingles applied over old, rough shingles.

Recommendations: Allow moisture to escape the Roofing system. This can be a slow process and could take until the following spring. Once the roofing system reaches the proper moisture content, the roof should lay flat and the buckling problem should not return. A 2nd solution is to remove the shingles that are affected, cut the wrinkle in the felt and replace the shingles. Add ventilation to the attic space, the minimum requirement is one square foot of net free vent area per 150 square feet of attic floor space if a vapor retarder is not present. If a vapor retarder is present, the amount of required ventilation can be reduced to one square foot of net free vent area per 300 square feet of attic floor space.

Consult the services of a professional and make sure the shingles are applied in accordance with the shingle manufacturer's recommendations.

Curling: Causes include: high nails, lack of back coating, under-saturation of asphalt felt in organic shingles, lack of ventilation and improper number of fasteners.

Recommendations : Check location and number of fasteners and consider adding additional roof ventilation.

Blistering: Caused by moisture in the shingle.

Recommendation: If the blister breaks open revealing the asphalt, the affected shingles should be replaced. Consult with the manufacturer of the shingles.

Missing Shingles: Causes include improper fastening and exposure to high winds.

Recommendations: Replace the shingles which have completely blown off. For shingles with tabs that are blowing up and down, hand seal the shingle with an asphalt plastic cement, commonly referred to as a flashing cement. The roofing cement must comply with ASTM D4586 - Type 1 or Type II - the standard for asbestos-free asphalt plastic roof cement. Be aware that some products may involve hazardous materials. It is the responsibility of the user to observe the safety and health practices as determined by the manufacturer of the product.

To hand seal, lift each tab of a 3-tab shingle and apply two spots(approximately the size of a quarter - placed 1" to 2" from each end of the tab near the bottom)of the cement under each tab. Laminated shingles require 4 spots of cement per shingle. After application, press the tab down firmly to start the bond. Be careful not to apply the cement too close to the bottom of the tab to avoid having the cement squeeze out when the tab is pressed down.

Ceiling Spots: These are caused by leaks in the roof.

Recommendations: Check attic for leaks. Check chimney and vents for cracks in flashing. Check rafters for leaks that travel away from the original source. Check eaves for water backing up from ice dams. Check roof for damaged shingles.

Missing Granules: Normally a certain number of granules will be loose, especially after application. These granules are called 'riders' and are a normal result of the manufacturing process. Granule loss does not affect the service life of the shingles unless granules can be seen missing on the surface, thus exposing the asphalt of Fiberglas® mat.

Recommendations: On aging shingles, missing granules indicate a need for replacement.

Rotting: Rotting is caused by absorption of moisture by the mat at the core of the shingle. This is a common problem with organic-based shingles.

Recommendation: Replace with Owens Corning Fiberglas® mat shingles.


Algae growth: causes include air-borne algae deposits and grows on roof with can affect long-term performance. Wood shakes are particularly susceptible to moss/algae growth. Algae growth occurs most often in damp and/or humid climates or in shaded areas of the roof.

Recommendations: Replace with algae resistant shake.

Damaged flashing: Caused by improper installation on a new roof, damaged or missing caulking, or drying and cracking on an old roof.

Recommendation: In most cases it is only necessary to replace the flashing and shingles around the damaged area.

Missing Shakes: Improper fastening, wind damage or deterioration of shakes may be the problem.

Recommendation: In most cases the missing shakes can be replaced individually. Be sure to check exposed underlayment for damaged first.

Curling: Generally caused by water absorption in wood or fiber-reinforced shakes.

Recommendations: Replace the shake, checking exposed underlayment for damage first. Add proper roof ventilation at the time of installation to prevent curling.

Splitting: Splitting can be the result of natural aging. Additional causes include: Condition is aggravated by water infiltration in wood, cement tile, or fiber-reinforced cement (FRC) shakes. Splitting can result from stress on the shake, like walking on it. Excessive foot traffic. The splitting problem is compounded in damp climates and areas with repeated freezing and thawing.

Recommendations include cutting out and replacing the damaged shakes, being sure to check exposed underlayment for damage first. Caulk smaller cracks.

Termite Damage: Caused by shake materials that provide sustenance for termites - particularly wood.

Recommendation is to exterminate by tenting and fumigating the home.

Ceiling Spots: Caused by leaks in the roof.

Recommendations: Check the attic for leaks in the deck. Check the chimney and vents for cracks in the flashing, Check the rafters for leaks that travel away from the original source. Check eaves for water back up from ice dams. Check the roof for damaged shingles.

Rotting: Caused by moisture absorption in certain shake materials, especially wood.

Recommendation: Cut out and replace rotted shakes. Be sure to check exposed underlayment for damage first.

SureNail® Technology

Regardless of which Duration® Series shingle option to choose for your home, you can rest easy knowing that it comes with the SureNail® Technology built right in.

surenail technology

SureNail® Technology, with a breakthrough design features a tough, woven, engineered reinforcing fabric in the nailing area to promote easy, fast and consistent nail gun fastening.

Triple layer protection® from a unique "triple layer" of reinforcement that occurs when the fabric overlays the common bond of the shingle laminate layers, resulting in an superior fastener holding power.

Additional features include:

  • Super sealing action with Tru-Bond® sealant that grips tightly to the nailing strip on the shingle below for greater bonding strength. (see image below)
  • SureNail® Wider Nailing Area: allows for an improved and consistent installation.
  • Extra Adhesive Power - specially formulated, extra-wide adhesive bands help keep shingle layers laminated together in virtually all weather conditions.
  • Exceptional wind resistance that delivers up 130-MPH wind warranty* performance with only 4 nails. Requires 33% fewer nails for maximum warranty protection**, which can mean fewer deck penetrations. * See actual warranty for complete details, limitations and requirements. ** Where allowed by code.

Which product is right for you? Here is a comparison chart to get you started. Iossi will go over any questions or concerns you have when you request a free quote.

Duration Series Product information

Your Choice

When it comes time to think about a new roof, there is more to consider than just color options. You want a product that will last and protect the investment you have made in your home. You want proper installation and a warranty you can rely on. Iossi can offer you what you are looking for. Your Choice.

Our Expertise

When it comes to making sure the products you get are top quality, Iossi takes the time to research them. In keeping with that, Iossi also takes the time to ensure that the people who install those products are not only qualified, but have a demonstrated history of quality workmanship. That is why when you choose Iossi.. you are choosing the best in all categories. i

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4374 State Street
Bettendorf, Iowa 52722


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Other times available by appointment

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